WLAN Controller / AP Image: Primary & Backup

[#1]

I've installed version 8.3.121.0 as the primary image. The backup image is 8.0.140.0 (default) (active).

I have pre-downloaded 8.3.121.0 to 102 of my APs that are supported. The image is set as the backup on them.

I have 51 APs that will not support the 8.3.121.0 image.

So, I have set 8.0.140.0 as (default) (active).

WLC config has been saved.

My goal is to maintain the new image on the APs that support it, but not use it until I can get the 51 unsupported APs replaced.

With the controller set: backup image is 8.0.140.0 (default) (active).

and

APs set: Primary SW Version = 8.0.140.0 & Backup SW Version = 8.3.121.0

Will this work, and prevent the new version from being used by either AP or WLC in the event either are rebooted or power cycled?

[Leo Laohoo]

My goal is to maintain the new image on the APs that support it, but not use it until I can get the 51 unsupported APs replaced.

The APs will use whatever firmware the controller will boot into.

[#3]

Thank you Leo.

[patoberli]

It should be fine with the APs as long as you don't issue the command to swap the image.

Not entirely sure with the WLC though, there is a possibility that it will take the primary image after a reload, although I think the (default) overrules that.

See here for the details about how to choose which image to boot:

http://www.cisco.com/c/en/us/support/docs/wireless/4400-series-wireless-lan-controllers/107530-backup-image-wlc.html